ASTRA

Publications

Publications

Our scientific team routinely publishes in peer-reviewed journals. Below are selected papers relevant to our on-going research in fundamental atmospheric physics.

2013 Interplanetary Magnetic Field By Control of Prompt Total Electron Content Increases During Superstorms G. Crowley
2013 Plasma distribution and electric field dynamics of ionospheric storm transition regions from GNSS imaging G. Crowley
2013 A Semi-Empirical Satellite Accommodation Model for Spherical and Randomly Tumbling Objects M. Pilinski
2012 DICE Mission Design, Development, and Implementations: Success and Challenges G. Crowley,
S. M. I. Azeem
2012 Tutorial: The Neutral Atmosphere and the Satellite Drag Environment G. Crowley,
S. M. I. Azeem,
M. Pilinski
2012 The Role of Zonal Winds in the Production of a Pre-reversal Enhancement in the Vertical Ion Drift in the Low Latitude Ionosphere G. Crowley,
S. M. I. Azeem
2012 Characteristics of Traveling Ionospheric Disturbances Observed by the TIDDBIT Sounder G. Crowley
2012 On TIE-GCM simulation of the evening equatorial plasma vortex G. Crowley
2012 Intense Dayside Joule Heating During the April 5, 2010 Geomagnetic Storm Recovery Phase Observed by AMIE and AMPERE G. Crowley
2012 Aerodynamic Analysis Based on CHAMP Satellite Lift-to-Drag Measurements M. Pilinski
2012 AMPERE and GEOScan: Utilizing Commercial Space Infrastructure for disaster mitigation, planning and response M. Pilinski
2012 The impact of helium on thermosphere mass density response to geomagnetic activity during the recent solar minimum M. Pilinski
2011 Effects of geomagnetic super storms on the ionospheric F-region in the South American sector using a GPS technique: A Review G. Crowley
2011 Plug-and-Play Space Weather Sensor for a CubeSat G. Crowley,
S. M. I. Azeem
2011 CASES: A Novel Low-Cost Ground-based Dual-Frequency GPS Software Receiver and Space Weather Monitor G. Crowley,
S. M. I. Azeem
2011 CASES: A Smart, Compact GPS SoftwareReceiver for Space Weather Monitoring G. Crowley
2011 C/NOFS detection of the equatorial ionospheric electric field response to the 2009 major sudden stratospheric warming event G. Crowley,
S. M. I. Azeem
2011 A Study of Space Shuttle Plumes in the Lower Thermosphere G. Crowley,
S. M. I. Azeem
2011 Extreme Poynting Flux in the Dayside Thermosphere: Examples and Statistics G. Crowley
2011 Deducing storm-time F-region ionospheric dynamics from 3-D time-varying imaging G. Crowley
2011 Dynamic Gas-Surface Interaction Modeling for Satellite Aerodynamic Computations M. Pilinski
2011 Measuring Absolute Thermospheric Densities and Accommodation Coefficients using Paddlewheel Satellites: Past Findings, Present Uses, and Future Mission Concepts M. Pilinski
2011 Drag Coefficients of Satellites with Concave Geometries: Comparing Models and Observations M. Pilinski
2010 Error Propagation in Ionospheric Image-based Parameter Estimation G. Crowley
2010 A comprehensive rocket and radar study of midlatitude spread F G. Crowley
2010 Space Weather Gets Real-on Smartphones G. Crowley
2010 Sources of the traveling ionospheric disturbances observed by the ionospheric TIDDBIT sounder near Wallops Island on 30 October 2007 G. Crowley
2010 Periodic spacing between consecutive equatorial plasma bubbles G. Crowley
2010 Can molecular diffusion explain Space Shuttle plume spreading? G. Crowley
2010 Thermospheric density enhancements in the dayside cusp region during strong BY conditions G. Crowley
2010 On the causes of plasmaspheric rotation variability: IMAGE EUV observations G. Crowley
2010 Comparison of the Hill-Siscoe Polar Cap Potential Theory with the Weimer and AMIE Models G. Crowley
2010 Mesosphere and lower thermosphere temperature anomalies and the 2002 Antarctic Sudden Stratospheric Warming S. M. I. Azeem
2010 Semi-Empirical Model for Satellite Energy-Accommodation Coefficients M. Pilinski
2009 Neutral wind estimation from 4-D ionospheric electron density images G. Crowley
2009 On the origin of pre-reversal enhancement of the zonal equatorial electric field G. Crowley
2009 Large-scale instabilities of the lower thermosphere during an active period G. Crowley
2009 Dynamics of the Dayside Aurora Australis S. M. I. Azeem
2009 Multi-Year Observations of Tidal Oscillations in OH-M(3,1) Rotational Temperatures at South Pole, Antarctica S. M. I. Azeem
2009 An Innovative Method for Measuring Drag on Small Satellites M. Pilinski
2008 Mapping the time-varying distribution of highaltitude plasma during storms, in Midlatitude Ionospheric Dynamics and Disturbances G. Crowley
2008 Joule Heating in the Lower Thermosphere Caused by Large-Scale Field-Aligned Currents – Solar Wind and Interplanetary Magnetic Field Influences G. Crowley
2008 Superposed epoch analysis of the dayside ionospheric response to four intense geomagnetic storms G. Crowley
2008 Periodic Modulations in Thermospheric Composition by Solar Wind High Speed Streams G. Crowley
2008 Neutral Composition and Density Effects in the October-November 2003 Magnetic Storms G. Crowley
2008 Disturbed O/N2 Ratios and Their Transport to Middle and Low Latitudes G. Crowley
2008 Impact of the Neutral Wind Dynamo on the Development of the Region 2 Dynamo G. Crowley
2008 Mapping the Time-Varying Distribution of High-Altitude Plasma During Storms G. Crowley
2008 An empirical model of the Earth’s horizontal wind fields: HWM07 G. Crowley
2008 Optical Estimation of Auroral Ion Upflow II: A Case Study S. M. I. Azeem
2007 Tracking of Polar Cap Ionospheric Patches using Data Assimilation G. Crowley
2007 Four Dimensional GPS Imaging of Space-Weather Storms G. Crowley
2007 Mars Thermospheric Winds from MGS and Odyssey Accelerometers G. Crowley
2007 Solar Cycle Variation and Long Term Trend in South Pole OH airglow Temperature Observations S. M. I. Azeem
2007 Tidal Features in the Northern High-Latitude Mesospheric Temperature and Neutral Winds S. M. I. Azeem
2006 Global Thermosphere-Ionosphere Response to Onset of November 20, 2003 Magnetic Storm G. Crowley
2006 Response of the upper/middle atmosphere to coronal holes and powerful high-speed solar wind streams in 2003, in Recurrent Magnetic Storms: Corotating Solar Wind Streams G. Crowley
2006 Effect of IMF By on thermospheric composition at high and middle latitudes: 2. Data comparisons G. Crowley
2006 Large variations in the thermosphere and ionosphere during minor geomagnetic disturbances in April 2002 and their association with IMF By G. Crowley
2006 Storm-Time Penetration Electric Fields and Their Effects G. Crowley
2006 The University Nanosat Program from Concept to Flight: a Dual Student Program Perspective on What Works and What Does Not M. Pilinski
2005 Global Thermosphere-Ionosphere Response to Geomagnetic Storms, Proceedings of the Ionospheric Effects Symposium, Alexandria, VA G. Crowley
2005 First look at the 20 November 2003 superstorm with TIMED/GUVI: Comparisons with a thermospheric global circulation model G. Crowley
2005 Energy transport in the thermosphere during the solar storms of April 2002 G. Crowley
2005 Effects of the major geomagnetic storms of October 2003 on the equatorial and low-latitude F region in two longitudinal sectors G. Crowley
2005 Thermospheric Density Structures Over the Polar Regions Observed With CHAMP G. Crowley
2005 Observational Study of the 4-Day Wave in the Mesosphere Preceding the Sudden Stratospheric Warming Events During 1995 and 2002 S. M. I. Azeem
2004 Response of the Equatorial and Low-Latitude Ionosphere during the Space Weather Events of April 2002 G. Crowley
2004 Longitudinal Difference Observed in the Ionospheric F-Region During the Major Geomagnetic Storm of March 31, 2001 G. Crowley
2004 Quiet-time seasonal behavior of the thermosphere seen in the far ultraviolet dayglow G. Crowley
2003 Initial observations with the Global Ultraviolet Imager (GUVI) in the NASA TIMED satellite mission G. Crowley
2003 Modeling of the Solar Wind Originated Energy Relevant to the Thermosphere/Ionosphere G. Crowley
2003 Comparison of Common Climatology Data G. Crowley
2003 The Use of Far Ultraviolet Remote Sensing to Monitor Space Weather G. Crowley
2002 Construction of a particle climatology for the study of solar particle fluxes on the atmosphere G. Crowley
2001 Dayside enhancements of thermospheric O/N2 following magnetic storm onset G. Crowley
2001 Quantification of high latitude electric field variability G. Crowley
2001 Observations of the 2-Day Wave in UARS MLS Temperature and Ozone S. M. I. Azeem
2000 Response to `Comment on “The diffuse aurora: A significant source of ionization in the middle atmosphere” by L. B. Callis` G. Crowley
2000 Transformation of high-latitude ionospheric F region patches into blobs during the March 21, 1990 G. Crowley
2000 Simulation of the pre-reversal enhancement in the low latitude vertical ion drifts G. Crowley
2000 A statistical model of the ionospheric electric potential G. Crowley
2000 The Use of Far Ultraviolet Remote Sensing to Monitor Space Weather G. Crowley
2000 Empirical modeling of particle precipitation and the study of effects on the terrestrial thermosphere and ionosphere G. Crowley
2000 Space-time analysis of TIMED-Doppler Interferometer (TIDI) measurements S. M. I. Azeem
1999 Next Generation Space Weather Specification and Forecasting Model, Proceedings of the Ionospheric Effects Symposium G. Crowley
1999 On the hemispheric symmetry in thermospheric nitric oxide G. Crowley
1999 Space Weather Simulation on Networks of Workstations G. Crowley
1999 Variations of the thermospheric nitric oxide mass mixing ratio as a function of Kp, altitude, and magnetic local time G. Crowley
1998 Nitric oxide variations in the mesosphere and lower thermosphere during the November 1993 storm period G. Crowley
1998 UARS particle environment monitor observations during the November 1993 storm: Auroral morphology, spectral characterization, and energy deposition G. Crowley
1998 The first real-time worldwide ionospheric predictions network: An advance in support of spaceborne experimentation, on-line model validation, and space weather G. Crowley
1997 Recent results of the CEDAR Storm Study G. Crowley
1997 The diffuse aurora: A significant source of ionization in the middle atmosphere G. Crowley
1997 Global simulations and observations of O(1S), O2(1ОЈ) and OH mesospheric nightglow emissions G. Crowley
1997 A theoretical analysis of the energy budget in the lower thermosphere S. M. I. Azeem
1997 Lower thermospheric neutral winds at Sondre Stromfjord: A seasonal analysis S. M. I. Azeem
1996 Critical Review on Ionospheric Patches and Blobs, in The Review of Radio Science 1992-1996 G. Crowley
1996 Cellular structures in the high-latitude thermosphere G. Crowley
1996 Neutral density cells in the lower thermosphere at high latitudes G. Crowley
1996 Formation mechanism for thermospheric neutral density cells at high latitudes G. Crowley
1996 Neutral Density Cells in the high latitude thermosphere: morphology for solar maximum deduced from TIGCM simulations G. Crowley
1995 Satellite observations of neutral density cells in the lower thermosphere at high latitudes, AGU Monograph 87 on the Mesosphere and Lower Thermosphere G. Crowley
1995 Interpretation of an unusual high latitude density decrease in terms of thermospheric density cells G. Crowley
1995 Ground-based observations of ion/neutral coupling at Thule and Qanaq, Greenland G. Crowley
1994 The Global Ultraviolet Imager (GUVI) for the NASA TIMED mission G. Crowley
1993 Global modeling of UV/Visible emissions from space: retrieval of mesosphere/lower thermosphere pressure, temperature and ozone, Proceedings of International Symposium on Spectral Sensing Research G. Crowley
1993 The dynamic ionospheric polar hole G. Crowley
1993 Ionospheric convection response to slow, strong variations in a northward interplanetary magnetic field: A case study for January 14, 1988 G. Crowley
1993 Global atmospheric remote sensing, Proceeding of the 25th International Symposium on remote sensing and global environment change G. Crowley
1993 Calculations of Riometer Absorption Associated with F-region Plasma Structures Based on Sondre Stromfjord Incoherent Scatter Radar Observation G. Crowley
1992 Digisonde measurements of polar cap convection for northward interplanetary magnetic field G. Crowley
1992 Polar Cap Convection for Bz Northward G. Crowley
1991 Dynamics of the Earth’s thermosphere: A Review G. Crowley
1990 Cusp signatures from the Digisonde? G. Crowley
1989 On the mechanisms responsible for high-latitude thermospheric composition variations during the recovery phase of a geomeagnetic storm G. Crowley
1989 The Equinox Transition Study: An overview G. Crowley
1989 Thermospheric dynamics during September 18-19, 1984 1. Model simulations G. Crowley
1989 Thermospheric dynamics during September 18-19, 1984 2. Validation of the NCAR thermospheric general circulation model G. Crowley
1989 Ionospheric effects at low latitudes during the March 22, 1979, geomagnetic storm G. Crowley
1989 Electrodynamic patterns for September 19, 1984 G. Crowley
1988 A synoptic study of TIDs observed in the United Kingdom during the first WAGS campaign G. Crowley
1988 An observation of atmospheric gravity wave cause and effect during the October 1985 WAGS campaign G. Crowley
1988 The general and propagation of atmospheric gravity waves observed during the World-wide Atmospheric Gravity wave Study (WAGS) G. Crowley
1987 Observational evidence of cavity modes in the Earth’s magnetosphere G. Crowley
1987 Comparison of short period TID morphologies in Antarctica during geomagnetically quiet and active intervals G. Crowley
1987 Observation of the source and propagation of atmospheric gravity waves G. Crowley
1985 High time-resolution heating associated with a Pc5 micropulsation G. Crowley
1984 Large simultaneous disturbances in the ionosphere over Antarctica G. Crowley
1984 Determination of vertical neutral temperature and wind profiles using EISCAT and HF Doppler radar G. Crowley
1980 Large simultaneous disturbances in the Antarctic ionosphere G. Crowley